1/****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31/****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53#include <linux/sched.h> 54#include <linux/slab.h> 55#include <linux/init.h> 56#include <linux/delay.h> 57#include <linux/netdevice.h> 58#include <linux/module.h> 59#include <linux/ethtool.h> 60#include <linux/usb.h> 61#include <linux/tty.h> 62#include <linux/tty_driver.h> 63#include <linux/tty_flip.h> 64#include <linux/kmod.h> 65#include <linux/rfkill.h> 66#include <linux/ip.h> 67#include <linux/uaccess.h> 68#include <linux/usb/cdc.h> 69#include <net/arp.h> 70#include <asm/byteorder.h> 71#include <linux/serial_core.h> 72#include <linux/serial.h> 73 74 75#define MOD_AUTHOR "Option Wireless" 76#define MOD_DESCRIPTION "USB High Speed Option driver" 77#define MOD_LICENSE "GPL" 78 79#define HSO_MAX_NET_DEVICES 10 80#define HSO__MAX_MTU 2048 81#define DEFAULT_MTU 1500 82#define DEFAULT_MRU 1500 83 84#define CTRL_URB_RX_SIZE 1024 85#define CTRL_URB_TX_SIZE 64 86 87#define BULK_URB_RX_SIZE 4096 88#define BULK_URB_TX_SIZE 8192 89 90#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 91#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 92#define MUX_BULK_RX_BUF_COUNT 4 93#define USB_TYPE_OPTION_VENDOR 0x20 94 95/* These definitions are used with the struct hso_net flags element */ 96/* - use *_bit operations on it. (bit indices not values.) */ 97#define HSO_NET_RUNNING 0 98 99#define HSO_NET_TX_TIMEOUT (HZ*10) 100 101#define HSO_SERIAL_MAGIC 0x48534f31 102 103/* Number of ttys to handle */ 104#define HSO_SERIAL_TTY_MINORS 256 105 106#define MAX_RX_URBS 2 107 108/*****************************************************************************/ 109/* Debugging functions */ 110/*****************************************************************************/ 111#define D__(lvl_, fmt, arg...) \ 112 do { \ 113 printk(lvl_ "[%d:%s]: " fmt "\n", \ 114 __LINE__, __func__, ## arg); \ 115 } while (0) 116 117#define D_(lvl, args...) \ 118 do { \ 119 if (lvl & debug) \ 120 D__(KERN_INFO, args); \ 121 } while (0) 122 123#define D1(args...) D_(0x01, ##args) 124#define D2(args...) D_(0x02, ##args) 125#define D3(args...) D_(0x04, ##args) 126#define D4(args...) D_(0x08, ##args) 127#define D5(args...) D_(0x10, ##args) 128 129/*****************************************************************************/ 130/* Enumerators */ 131/*****************************************************************************/ 132enum pkt_parse_state { 133 WAIT_IP, 134 WAIT_DATA, 135 WAIT_SYNC 136}; 137 138/*****************************************************************************/ 139/* Structs */ 140/*****************************************************************************/ 141 142struct hso_shared_int { 143 struct usb_endpoint_descriptor *intr_endp; 144 void *shared_intr_buf; 145 struct urb *shared_intr_urb; 146 struct usb_device *usb; 147 int use_count; 148 int ref_count; 149 struct mutex shared_int_lock; 150}; 151 152struct hso_net { 153 struct hso_device *parent; 154 struct net_device *net; 155 struct rfkill *rfkill; 156 char name[24]; 157 158 struct usb_endpoint_descriptor *in_endp; 159 struct usb_endpoint_descriptor *out_endp; 160 161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 162 struct urb *mux_bulk_tx_urb; 163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 164 void *mux_bulk_tx_buf; 165 166 struct sk_buff *skb_rx_buf; 167 struct sk_buff *skb_tx_buf; 168 169 enum pkt_parse_state rx_parse_state; 170 spinlock_t net_lock; 171 172 unsigned short rx_buf_size; 173 unsigned short rx_buf_missing; 174 struct iphdr rx_ip_hdr; 175 176 unsigned long flags; 177}; 178 179enum rx_ctrl_state{ 180 RX_IDLE, 181 RX_SENT, 182 RX_PENDING 183}; 184 185#define BM_REQUEST_TYPE (0xa1) 186#define B_NOTIFICATION (0x20) 187#define W_VALUE (0x0) 188#define W_LENGTH (0x2) 189 190#define B_OVERRUN (0x1<<6) 191#define B_PARITY (0x1<<5) 192#define B_FRAMING (0x1<<4) 193#define B_RING_SIGNAL (0x1<<3) 194#define B_BREAK (0x1<<2) 195#define B_TX_CARRIER (0x1<<1) 196#define B_RX_CARRIER (0x1<<0) 197 198struct hso_serial_state_notification { 199 u8 bmRequestType; 200 u8 bNotification; 201 u16 wValue; 202 u16 wIndex; 203 u16 wLength; 204 u16 UART_state_bitmap; 205} __packed; 206 207struct hso_tiocmget { 208 struct mutex mutex; 209 wait_queue_head_t waitq; 210 int intr_completed; 211 struct usb_endpoint_descriptor *endp; 212 struct urb *urb; 213 struct hso_serial_state_notification serial_state_notification; 214 u16 prev_UART_state_bitmap; 215 struct uart_icount icount; 216}; 217 218 219struct hso_serial { 220 struct hso_device *parent; 221 int magic; 222 u8 minor; 223 224 struct hso_shared_int *shared_int; 225 226 /* rx/tx urb could be either a bulk urb or a control urb depending 227 on which serial port it is used on. */ 228 struct urb *rx_urb[MAX_RX_URBS]; 229 u8 num_rx_urbs; 230 u8 *rx_data[MAX_RX_URBS]; 231 u16 rx_data_length; /* should contain allocated length */ 232 233 struct urb *tx_urb; 234 u8 *tx_data; 235 u8 *tx_buffer; 236 u16 tx_data_length; /* should contain allocated length */ 237 u16 tx_data_count; 238 u16 tx_buffer_count; 239 struct usb_ctrlrequest ctrl_req_tx; 240 struct usb_ctrlrequest ctrl_req_rx; 241 242 struct usb_endpoint_descriptor *in_endp; 243 struct usb_endpoint_descriptor *out_endp; 244 245 enum rx_ctrl_state rx_state; 246 u8 rts_state; 247 u8 dtr_state; 248 unsigned tx_urb_used:1; 249 250 struct tty_port port; 251 /* from usb_serial_port */ 252 spinlock_t serial_lock; 253 254 int (*write_data) (struct hso_serial *serial); 255 struct hso_tiocmget *tiocmget; 256 /* Hacks required to get flow control 257 * working on the serial receive buffers 258 * so as not to drop characters on the floor. 259 */ 260 int curr_rx_urb_idx; 261 u8 rx_urb_filled[MAX_RX_URBS]; 262 struct tasklet_struct unthrottle_tasklet; 263}; 264 265struct hso_device { 266 union { 267 struct hso_serial *dev_serial; 268 struct hso_net *dev_net; 269 } port_data; 270 271 u32 port_spec; 272 273 u8 is_active; 274 u8 usb_gone; 275 struct work_struct async_get_intf; 276 struct work_struct async_put_intf; 277 278 struct usb_device *usb; 279 struct usb_interface *interface; 280 281 struct device *dev; 282 struct kref ref; 283 struct mutex mutex; 284}; 285 286/* Type of interface */ 287#define HSO_INTF_MASK 0xFF00 288#define HSO_INTF_MUX 0x0100 289#define HSO_INTF_BULK 0x0200 290 291/* Type of port */ 292#define HSO_PORT_MASK 0xFF 293#define HSO_PORT_NO_PORT 0x0 294#define HSO_PORT_CONTROL 0x1 295#define HSO_PORT_APP 0x2 296#define HSO_PORT_GPS 0x3 297#define HSO_PORT_PCSC 0x4 298#define HSO_PORT_APP2 0x5 299#define HSO_PORT_GPS_CONTROL 0x6 300#define HSO_PORT_MSD 0x7 301#define HSO_PORT_VOICE 0x8 302#define HSO_PORT_DIAG2 0x9 303#define HSO_PORT_DIAG 0x10 304#define HSO_PORT_MODEM 0x11 305#define HSO_PORT_NETWORK 0x12 306 307/* Additional device info */ 308#define HSO_INFO_MASK 0xFF000000 309#define HSO_INFO_CRC_BUG 0x01000000 310 311/*****************************************************************************/ 312/* Prototypes */ 313/*****************************************************************************/ 314/* Serial driver functions */ 315static int hso_serial_tiocmset(struct tty_struct *tty, 316 unsigned int set, unsigned int clear); 317static void ctrl_callback(struct urb *urb); 318static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 319static void hso_kick_transmit(struct hso_serial *serial); 320/* Helper functions */ 321static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 322 struct usb_device *usb, gfp_t gfp); 323static void handle_usb_error(int status, const char *function, 324 struct hso_device *hso_dev); 325static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 326 int type, int dir); 327static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 328static void hso_free_interface(struct usb_interface *intf); 329static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 330static int hso_stop_serial_device(struct hso_device *hso_dev); 331static int hso_start_net_device(struct hso_device *hso_dev); 332static void hso_free_shared_int(struct hso_shared_int *shared_int); 333static int hso_stop_net_device(struct hso_device *hso_dev); 334static void hso_serial_ref_free(struct kref *ref); 335static void hso_std_serial_read_bulk_callback(struct urb *urb); 336static int hso_mux_serial_read(struct hso_serial *serial); 337static void async_get_intf(struct work_struct *data); 338static void async_put_intf(struct work_struct *data); 339static int hso_put_activity(struct hso_device *hso_dev); 340static int hso_get_activity(struct hso_device *hso_dev); 341static void tiocmget_intr_callback(struct urb *urb); 342/*****************************************************************************/ 343/* Helping functions */ 344/*****************************************************************************/ 345 346/* #define DEBUG */ 347 348static inline struct hso_net *dev2net(struct hso_device *hso_dev) 349{ 350 return hso_dev->port_data.dev_net; 351} 352 353static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 354{ 355 return hso_dev->port_data.dev_serial; 356} 357 358/* Debugging functions */ 359#ifdef DEBUG 360static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 361 unsigned int len) 362{ 363 static char name[255]; 364 365 sprintf(name, "hso[%d:%s]", line_count, func_name); 366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 367} 368 369#define DUMP(buf_, len_) \ 370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 371 372#define DUMP1(buf_, len_) \ 373 do { \ 374 if (0x01 & debug) \ 375 DUMP(buf_, len_); \ 376 } while (0) 377#else 378#define DUMP(buf_, len_) 379#define DUMP1(buf_, len_) 380#endif 381 382/* module parameters */ 383static int debug; 384static int tty_major; 385static int disable_net; 386 387/* driver info */ 388static const char driver_name[] = "hso"; 389static const char tty_filename[] = "ttyHS"; 390static const char *version = __FILE__ ": " MOD_AUTHOR; 391/* the usb driver itself (registered in hso_init) */ 392static struct usb_driver hso_driver; 393/* serial structures */ 394static struct tty_driver *tty_drv; 395static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 396static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 397static spinlock_t serial_table_lock; 398 399static const s32 default_port_spec[] = { 400 HSO_INTF_MUX | HSO_PORT_NETWORK, 401 HSO_INTF_BULK | HSO_PORT_DIAG, 402 HSO_INTF_BULK | HSO_PORT_MODEM, 403 0 404}; 405 406static const s32 icon321_port_spec[] = { 407 HSO_INTF_MUX | HSO_PORT_NETWORK, 408 HSO_INTF_BULK | HSO_PORT_DIAG2, 409 HSO_INTF_BULK | HSO_PORT_MODEM, 410 HSO_INTF_BULK | HSO_PORT_DIAG, 411 0 412}; 413 414#define default_port_device(vendor, product) \ 415 USB_DEVICE(vendor, product), \ 416 .driver_info = (kernel_ulong_t)default_port_spec 417 418#define icon321_port_device(vendor, product) \ 419 USB_DEVICE(vendor, product), \ 420 .driver_info = (kernel_ulong_t)icon321_port_spec 421 422/* list of devices we support */ 423static const struct usb_device_id hso_ids[] = { 424 {default_port_device(0x0af0, 0x6711)}, 425 {default_port_device(0x0af0, 0x6731)}, 426 {default_port_device(0x0af0, 0x6751)}, 427 {default_port_device(0x0af0, 0x6771)}, 428 {default_port_device(0x0af0, 0x6791)}, 429 {default_port_device(0x0af0, 0x6811)}, 430 {default_port_device(0x0af0, 0x6911)}, 431 {default_port_device(0x0af0, 0x6951)}, 432 {default_port_device(0x0af0, 0x6971)}, 433 {default_port_device(0x0af0, 0x7011)}, 434 {default_port_device(0x0af0, 0x7031)}, 435 {default_port_device(0x0af0, 0x7051)}, 436 {default_port_device(0x0af0, 0x7071)}, 437 {default_port_device(0x0af0, 0x7111)}, 438 {default_port_device(0x0af0, 0x7211)}, 439 {default_port_device(0x0af0, 0x7251)}, 440 {default_port_device(0x0af0, 0x7271)}, 441 {default_port_device(0x0af0, 0x7311)}, 442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 452 {USB_DEVICE(0x0af0, 0x7701)}, 453 {USB_DEVICE(0x0af0, 0x7706)}, 454 {USB_DEVICE(0x0af0, 0x7801)}, 455 {USB_DEVICE(0x0af0, 0x7901)}, 456 {USB_DEVICE(0x0af0, 0x7A01)}, 457 {USB_DEVICE(0x0af0, 0x7A05)}, 458 {USB_DEVICE(0x0af0, 0x8200)}, 459 {USB_DEVICE(0x0af0, 0x8201)}, 460 {USB_DEVICE(0x0af0, 0x8300)}, 461 {USB_DEVICE(0x0af0, 0x8302)}, 462 {USB_DEVICE(0x0af0, 0x8304)}, 463 {USB_DEVICE(0x0af0, 0x8400)}, 464 {USB_DEVICE(0x0af0, 0x8600)}, 465 {USB_DEVICE(0x0af0, 0x8800)}, 466 {USB_DEVICE(0x0af0, 0x8900)}, 467 {USB_DEVICE(0x0af0, 0x9000)}, 468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 469 {USB_DEVICE(0x0af0, 0xd035)}, 470 {USB_DEVICE(0x0af0, 0xd055)}, 471 {USB_DEVICE(0x0af0, 0xd155)}, 472 {USB_DEVICE(0x0af0, 0xd255)}, 473 {USB_DEVICE(0x0af0, 0xd057)}, 474 {USB_DEVICE(0x0af0, 0xd157)}, 475 {USB_DEVICE(0x0af0, 0xd257)}, 476 {USB_DEVICE(0x0af0, 0xd357)}, 477 {USB_DEVICE(0x0af0, 0xd058)}, 478 {USB_DEVICE(0x0af0, 0xc100)}, 479 {} 480}; 481MODULE_DEVICE_TABLE(usb, hso_ids); 482 483/* Sysfs attribute */ 484static ssize_t hso_sysfs_show_porttype(struct device *dev, 485 struct device_attribute *attr, 486 char *buf) 487{ 488 struct hso_device *hso_dev = dev_get_drvdata(dev); 489 char *port_name; 490 491 if (!hso_dev) 492 return 0; 493 494 switch (hso_dev->port_spec & HSO_PORT_MASK) { 495 case HSO_PORT_CONTROL: 496 port_name = "Control"; 497 break; 498 case HSO_PORT_APP: 499 port_name = "Application"; 500 break; 501 case HSO_PORT_APP2: 502 port_name = "Application2"; 503 break; 504 case HSO_PORT_GPS: 505 port_name = "GPS"; 506 break; 507 case HSO_PORT_GPS_CONTROL: 508 port_name = "GPS Control"; 509 break; 510 case HSO_PORT_PCSC: 511 port_name = "PCSC"; 512 break; 513 case HSO_PORT_DIAG: 514 port_name = "Diagnostic"; 515 break; 516 case HSO_PORT_DIAG2: 517 port_name = "Diagnostic2"; 518 break; 519 case HSO_PORT_MODEM: 520 port_name = "Modem"; 521 break; 522 case HSO_PORT_NETWORK: 523 port_name = "Network"; 524 break; 525 default: 526 port_name = "Unknown"; 527 break; 528 } 529 530 return sprintf(buf, "%s\n", port_name); 531} 532static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 533 534static struct attribute *hso_serial_dev_attrs[] = { 535 &dev_attr_hsotype.attr, 536 NULL 537}; 538 539ATTRIBUTE_GROUPS(hso_serial_dev); 540 541static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 542{ 543 int idx; 544 545 for (idx = 0; idx < serial->num_rx_urbs; idx++) 546 if (serial->rx_urb[idx] == urb) 547 return idx; 548 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 549 return -1; 550} 551 552/* converts mux value to a port spec value */ 553static u32 hso_mux_to_port(int mux) 554{ 555 u32 result; 556 557 switch (mux) { 558 case 0x1: 559 result = HSO_PORT_CONTROL; 560 break; 561 case 0x2: 562 result = HSO_PORT_APP; 563 break; 564 case 0x4: 565 result = HSO_PORT_PCSC; 566 break; 567 case 0x8: 568 result = HSO_PORT_GPS; 569 break; 570 case 0x10: 571 result = HSO_PORT_APP2; 572 break; 573 default: 574 result = HSO_PORT_NO_PORT; 575 } 576 return result; 577} 578 579/* converts port spec value to a mux value */ 580static u32 hso_port_to_mux(int port) 581{ 582 u32 result; 583 584 switch (port & HSO_PORT_MASK) { 585 case HSO_PORT_CONTROL: 586 result = 0x0; 587 break; 588 case HSO_PORT_APP: 589 result = 0x1; 590 break; 591 case HSO_PORT_PCSC: 592 result = 0x2; 593 break; 594 case HSO_PORT_GPS: 595 result = 0x3; 596 break; 597 case HSO_PORT_APP2: 598 result = 0x4; 599 break; 600 default: 601 result = 0x0; 602 } 603 return result; 604} 605 606static struct hso_serial *get_serial_by_shared_int_and_type( 607 struct hso_shared_int *shared_int, 608 int mux) 609{ 610 int i, port; 611 612 port = hso_mux_to_port(mux); 613 614 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 615 if (serial_table[i] && 616 (dev2ser(serial_table[i])->shared_int == shared_int) && 617 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 618 return dev2ser(serial_table[i]); 619 } 620 } 621 622 return NULL; 623} 624 625static struct hso_serial *get_serial_by_index(unsigned index) 626{ 627 struct hso_serial *serial = NULL; 628 unsigned long flags; 629 630 spin_lock_irqsave(&serial_table_lock, flags); 631 if (serial_table[index]) 632 serial = dev2ser(serial_table[index]); 633 spin_unlock_irqrestore(&serial_table_lock, flags); 634 635 return serial; 636} 637 638static int get_free_serial_index(void) 639{ 640 int index; 641 unsigned long flags; 642 643 spin_lock_irqsave(&serial_table_lock, flags); 644 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 645 if (serial_table[index] == NULL) { 646 spin_unlock_irqrestore(&serial_table_lock, flags); 647 return index; 648 } 649 } 650 spin_unlock_irqrestore(&serial_table_lock, flags); 651 652 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 653 return -1; 654} 655 656static void set_serial_by_index(unsigned index, struct hso_serial *serial) 657{ 658 unsigned long flags; 659 660 spin_lock_irqsave(&serial_table_lock, flags); 661 if (serial) 662 serial_table[index] = serial->parent; 663 else 664 serial_table[index] = NULL; 665 spin_unlock_irqrestore(&serial_table_lock, flags); 666} 667 668static void handle_usb_error(int status, const char *function, 669 struct hso_device *hso_dev) 670{ 671 char *explanation; 672 673 switch (status) { 674 case -ENODEV: 675 explanation = "no device"; 676 break; 677 case -ENOENT: 678 explanation = "endpoint not enabled"; 679 break; 680 case -EPIPE: 681 explanation = "endpoint stalled"; 682 break; 683 case -ENOSPC: 684 explanation = "not enough bandwidth"; 685 break; 686 case -ESHUTDOWN: 687 explanation = "device disabled"; 688 break; 689 case -EHOSTUNREACH: 690 explanation = "device suspended"; 691 break; 692 case -EINVAL: 693 case -EAGAIN: 694 case -EFBIG: 695 case -EMSGSIZE: 696 explanation = "internal error"; 697 break; 698 case -EILSEQ: 699 case -EPROTO: 700 case -ETIME: 701 case -ETIMEDOUT: 702 explanation = "protocol error"; 703 if (hso_dev) 704 usb_queue_reset_device(hso_dev->interface); 705 break; 706 default: 707 explanation = "unknown status"; 708 break; 709 } 710 711 /* log a meaningful explanation of an USB status */ 712 D1("%s: received USB status - %s (%d)", function, explanation, status); 713} 714 715/* Network interface functions */ 716 717/* called when net interface is brought up by ifconfig */ 718static int hso_net_open(struct net_device *net) 719{ 720 struct hso_net *odev = netdev_priv(net); 721 unsigned long flags = 0; 722 723 if (!odev) { 724 dev_err(&net->dev, "No net device !\n"); 725 return -ENODEV; 726 } 727 728 odev->skb_tx_buf = NULL; 729 730 /* setup environment */ 731 spin_lock_irqsave(&odev->net_lock, flags); 732 odev->rx_parse_state = WAIT_IP; 733 odev->rx_buf_size = 0; 734 odev->rx_buf_missing = sizeof(struct iphdr); 735 spin_unlock_irqrestore(&odev->net_lock, flags); 736 737 /* We are up and running. */ 738 set_bit(HSO_NET_RUNNING, &odev->flags); 739 hso_start_net_device(odev->parent); 740 741 /* Tell the kernel we are ready to start receiving from it */ 742 netif_start_queue(net); 743 744 return 0; 745} 746 747/* called when interface is brought down by ifconfig */ 748static int hso_net_close(struct net_device *net) 749{ 750 struct hso_net *odev = netdev_priv(net); 751 752 /* we don't need the queue anymore */ 753 netif_stop_queue(net); 754 /* no longer running */ 755 clear_bit(HSO_NET_RUNNING, &odev->flags); 756 757 hso_stop_net_device(odev->parent); 758 759 /* done */ 760 return 0; 761} 762 763/* USB tells is xmit done, we should start the netqueue again */ 764static void write_bulk_callback(struct urb *urb) 765{ 766 struct hso_net *odev = urb->context; 767 int status = urb->status; 768 769 /* Sanity check */ 770 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 771 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 772 return; 773 } 774 775 /* Do we still have a valid kernel network device? */ 776 if (!netif_device_present(odev->net)) { 777 dev_err(&urb->dev->dev, "%s: net device not present\n", 778 __func__); 779 return; 780 } 781 782 /* log status, but don't act on it, we don't need to resubmit anything 783 * anyhow */ 784 if (status) 785 handle_usb_error(status, __func__, odev->parent); 786 787 hso_put_activity(odev->parent); 788 789 /* Tell the network interface we are ready for another frame */ 790 netif_wake_queue(odev->net); 791} 792 793/* called by kernel when we need to transmit a packet */ 794static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 795 struct net_device *net) 796{ 797 struct hso_net *odev = netdev_priv(net); 798 int result; 799 800 /* Tell the kernel, "No more frames 'til we are done with this one." */ 801 netif_stop_queue(net); 802 if (hso_get_activity(odev->parent) == -EAGAIN) { 803 odev->skb_tx_buf = skb; 804 return NETDEV_TX_OK; 805 } 806 807 /* log if asked */ 808 DUMP1(skb->data, skb->len); 809 /* Copy it from kernel memory to OUR memory */ 810 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 811 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 812 813 /* Fill in the URB for shipping it out. */ 814 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 815 odev->parent->usb, 816 usb_sndbulkpipe(odev->parent->usb, 817 odev->out_endp-> 818 bEndpointAddress & 0x7F), 819 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 820 odev); 821 822 /* Deal with the Zero Length packet problem, I hope */ 823 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 824 825 /* Send the URB on its merry way. */ 826 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 827 if (result) { 828 dev_warn(&odev->parent->interface->dev, 829 "failed mux_bulk_tx_urb %d\n", result); 830 net->stats.tx_errors++; 831 netif_start_queue(net); 832 } else { 833 net->stats.tx_packets++; 834 net->stats.tx_bytes += skb->len; 835 } 836 dev_kfree_skb(skb); 837 /* we're done */ 838 return NETDEV_TX_OK; 839} 840 841static const struct ethtool_ops ops = { 842 .get_link = ethtool_op_get_link 843}; 844 845/* called when a packet did not ack after watchdogtimeout */ 846static void hso_net_tx_timeout(struct net_device *net) 847{ 848 struct hso_net *odev = netdev_priv(net); 849 850 if (!odev) 851 return; 852 853 /* Tell syslog we are hosed. */ 854 dev_warn(&net->dev, "Tx timed out.\n"); 855 856 /* Tear the waiting frame off the list */ 857 if (odev->mux_bulk_tx_urb && 858 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 859 usb_unlink_urb(odev->mux_bulk_tx_urb); 860 861 /* Update statistics */ 862 net->stats.tx_errors++; 863} 864 865/* make a real packet from the received USB buffer */ 866static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 867 unsigned int count, unsigned char is_eop) 868{ 869 unsigned short temp_bytes; 870 unsigned short buffer_offset = 0; 871 unsigned short frame_len; 872 unsigned char *tmp_rx_buf; 873 874 /* log if needed */ 875 D1("Rx %d bytes", count); 876 DUMP(ip_pkt, min(128, (int)count)); 877 878 while (count) { 879 switch (odev->rx_parse_state) { 880 case WAIT_IP: 881 /* waiting for IP header. */ 882 /* wanted bytes - size of ip header */ 883 temp_bytes = 884 (count < 885 odev->rx_buf_missing) ? count : odev-> 886 rx_buf_missing; 887 888 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 889 odev->rx_buf_size, ip_pkt + buffer_offset, 890 temp_bytes); 891 892 odev->rx_buf_size += temp_bytes; 893 buffer_offset += temp_bytes; 894 odev->rx_buf_missing -= temp_bytes; 895 count -= temp_bytes; 896 897 if (!odev->rx_buf_missing) { 898 /* header is complete allocate an sk_buffer and 899 * continue to WAIT_DATA */ 900 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 901 902 if ((frame_len > DEFAULT_MRU) || 903 (frame_len < sizeof(struct iphdr))) { 904 dev_err(&odev->net->dev, 905 "Invalid frame (%d) length\n", 906 frame_len); 907 odev->rx_parse_state = WAIT_SYNC; 908 continue; 909 } 910 /* Allocate an sk_buff */ 911 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 912 frame_len); 913 if (!odev->skb_rx_buf) { 914 /* We got no receive buffer. */ 915 D1("could not allocate memory"); 916 odev->rx_parse_state = WAIT_SYNC; 917 continue; 918 } 919 920 /* Copy what we got so far. make room for iphdr 921 * after tail. */ 922 tmp_rx_buf = 923 skb_put(odev->skb_rx_buf, 924 sizeof(struct iphdr)); 925 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 926 sizeof(struct iphdr)); 927 928 /* ETH_HLEN */ 929 odev->rx_buf_size = sizeof(struct iphdr); 930 931 /* Filip actually use .tot_len */ 932 odev->rx_buf_missing = 933 frame_len - sizeof(struct iphdr); 934 odev->rx_parse_state = WAIT_DATA; 935 } 936 break; 937 938 case WAIT_DATA: 939 temp_bytes = (count < odev->rx_buf_missing) 940 ? count : odev->rx_buf_missing; 941 942 /* Copy the rest of the bytes that are left in the 943 * buffer into the waiting sk_buf. */ 944 /* Make room for temp_bytes after tail. */ 945 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 946 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 947 948 odev->rx_buf_missing -= temp_bytes; 949 count -= temp_bytes; 950 buffer_offset += temp_bytes; 951 odev->rx_buf_size += temp_bytes; 952 if (!odev->rx_buf_missing) { 953 /* Packet is complete. Inject into stack. */ 954 /* We have IP packet here */ 955 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 956 skb_reset_mac_header(odev->skb_rx_buf); 957 958 /* Ship it off to the kernel */ 959 netif_rx(odev->skb_rx_buf); 960 /* No longer our buffer. */ 961 odev->skb_rx_buf = NULL; 962 963 /* update out statistics */ 964 odev->net->stats.rx_packets++; 965 966 odev->net->stats.rx_bytes += odev->rx_buf_size; 967 968 odev->rx_buf_size = 0; 969 odev->rx_buf_missing = sizeof(struct iphdr); 970 odev->rx_parse_state = WAIT_IP; 971 } 972 break; 973 974 case WAIT_SYNC: 975 D1(" W_S"); 976 count = 0; 977 break; 978 default: 979 D1(" "); 980 count--; 981 break; 982 } 983 } 984 985 /* Recovery mechanism for WAIT_SYNC state. */ 986 if (is_eop) { 987 if (odev->rx_parse_state == WAIT_SYNC) { 988 odev->rx_parse_state = WAIT_IP; 989 odev->rx_buf_size = 0; 990 odev->rx_buf_missing = sizeof(struct iphdr); 991 } 992 } 993} 994 995static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 996{ 997 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 998 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 999 1000 if (((rest == 5) || (rest == 6)) && 1001 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 1002 crc_check, 4)) { 1003 urb->actual_length -= 4; 1004 } 1005} 1006 1007/* Moving data from usb to kernel (in interrupt state) */ 1008static void read_bulk_callback(struct urb *urb) 1009{ 1010 struct hso_net *odev = urb->context; 1011 struct net_device *net; 1012 int result; 1013 int status = urb->status; 1014 1015 /* is al ok? (Filip: Who's Al ?) */ 1016 if (status) { 1017 handle_usb_error(status, __func__, odev->parent); 1018 return; 1019 } 1020 1021 /* Sanity check */ 1022 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1023 D1("BULK IN callback but driver is not active!"); 1024 return; 1025 } 1026 usb_mark_last_busy(urb->dev); 1027 1028 net = odev->net; 1029 1030 if (!netif_device_present(net)) { 1031 /* Somebody killed our network interface... */ 1032 return; 1033 } 1034 1035 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1036 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1037 1038 /* do we even have a packet? */ 1039 if (urb->actual_length) { 1040 /* Handle the IP stream, add header and push it onto network 1041 * stack if the packet is complete. */ 1042 spin_lock(&odev->net_lock); 1043 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1044 (urb->transfer_buffer_length > 1045 urb->actual_length) ? 1 : 0); 1046 spin_unlock(&odev->net_lock); 1047 } 1048 1049 /* We are done with this URB, resubmit it. Prep the USB to wait for 1050 * another frame. Reuse same as received. */ 1051 usb_fill_bulk_urb(urb, 1052 odev->parent->usb, 1053 usb_rcvbulkpipe(odev->parent->usb, 1054 odev->in_endp-> 1055 bEndpointAddress & 0x7F), 1056 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1057 read_bulk_callback, odev); 1058 1059 /* Give this to the USB subsystem so it can tell us when more data 1060 * arrives. */ 1061 result = usb_submit_urb(urb, GFP_ATOMIC); 1062 if (result) 1063 dev_warn(&odev->parent->interface->dev, 1064 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1065 result); 1066} 1067 1068/* Serial driver functions */ 1069 1070static void hso_init_termios(struct ktermios *termios) 1071{ 1072 /* 1073 * The default requirements for this device are: 1074 */ 1075 termios->c_iflag &= 1076 ~(IGNBRK /* disable ignore break */ 1077 | BRKINT /* disable break causes interrupt */ 1078 | PARMRK /* disable mark parity errors */ 1079 | ISTRIP /* disable clear high bit of input characters */ 1080 | INLCR /* disable translate NL to CR */ 1081 | IGNCR /* disable ignore CR */ 1082 | ICRNL /* disable translate CR to NL */ 1083 | IXON); /* disable enable XON/XOFF flow control */ 1084 1085 /* disable postprocess output characters */ 1086 termios->c_oflag &= ~OPOST; 1087 1088 termios->c_lflag &= 1089 ~(ECHO /* disable echo input characters */ 1090 | ECHONL /* disable echo new line */ 1091 | ICANON /* disable erase, kill, werase, and rprnt 1092 special characters */ 1093 | ISIG /* disable interrupt, quit, and suspend special 1094 characters */ 1095 | IEXTEN); /* disable non-POSIX special characters */ 1096 1097 termios->c_cflag &= 1098 ~(CSIZE /* no size */ 1099 | PARENB /* disable parity bit */ 1100 | CBAUD /* clear current baud rate */ 1101 | CBAUDEX); /* clear current buad rate */ 1102 1103 termios->c_cflag |= CS8; /* character size 8 bits */ 1104 1105 /* baud rate 115200 */ 1106 tty_termios_encode_baud_rate(termios, 115200, 115200); 1107} 1108 1109static void _hso_serial_set_termios(struct tty_struct *tty, 1110 struct ktermios *old) 1111{ 1112 struct hso_serial *serial = tty->driver_data; 1113 1114 if (!serial) { 1115 printk(KERN_ERR "%s: no tty structures", __func__); 1116 return; 1117 } 1118 1119 D4("port %d", serial->minor); 1120 1121 /* 1122 * Fix up unsupported bits 1123 */ 1124 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1125 1126 tty->termios.c_cflag &= 1127 ~(CSIZE /* no size */ 1128 | PARENB /* disable parity bit */ 1129 | CBAUD /* clear current baud rate */ 1130 | CBAUDEX); /* clear current buad rate */ 1131 1132 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1133 1134 /* baud rate 115200 */ 1135 tty_encode_baud_rate(tty, 115200, 115200); 1136} 1137 1138static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1139{ 1140 int result; 1141 /* We are done with this URB, resubmit it. Prep the USB to wait for 1142 * another frame */ 1143 usb_fill_bulk_urb(urb, serial->parent->usb, 1144 usb_rcvbulkpipe(serial->parent->usb, 1145 serial->in_endp-> 1146 bEndpointAddress & 0x7F), 1147 urb->transfer_buffer, serial->rx_data_length, 1148 hso_std_serial_read_bulk_callback, serial); 1149 /* Give this to the USB subsystem so it can tell us when more data 1150 * arrives. */ 1151 result = usb_submit_urb(urb, GFP_ATOMIC); 1152 if (result) { 1153 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1154 __func__, result); 1155 } 1156} 1157 1158 1159 1160 1161static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1162{ 1163 int count; 1164 struct urb *curr_urb; 1165 1166 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1167 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1168 count = put_rxbuf_data(curr_urb, serial); 1169 if (count == -1) 1170 return; 1171 if (count == 0) { 1172 serial->curr_rx_urb_idx++; 1173 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1174 serial->curr_rx_urb_idx = 0; 1175 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1176 } 1177 } 1178} 1179 1180static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1181{ 1182 int count = 0; 1183 struct urb *urb; 1184 1185 urb = serial->rx_urb[0]; 1186 if (serial->port.count > 0) { 1187 count = put_rxbuf_data(urb, serial); 1188 if (count == -1) 1189 return; 1190 } 1191 /* Re issue a read as long as we receive data. */ 1192 1193 if (count == 0 && ((urb->actual_length != 0) || 1194 (serial->rx_state == RX_PENDING))) { 1195 serial->rx_state = RX_SENT; 1196 hso_mux_serial_read(serial); 1197 } else 1198 serial->rx_state = RX_IDLE; 1199} 1200 1201 1202/* read callback for Diag and CS port */ 1203static void hso_std_serial_read_bulk_callback(struct urb *urb) 1204{ 1205 struct hso_serial *serial = urb->context; 1206 int status = urb->status; 1207 1208 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1209 1210 /* sanity check */ 1211 if (!serial) { 1212 D1("serial == NULL"); 1213 return; 1214 } 1215 if (status) { 1216 handle_usb_error(status, __func__, serial->parent); 1217 return; 1218 } 1219 1220 D1("Actual length = %d\n", urb->actual_length); 1221 DUMP1(urb->transfer_buffer, urb->actual_length); 1222 1223 /* Anyone listening? */ 1224 if (serial->port.count == 0) 1225 return; 1226 1227 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1228 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1229 /* Valid data, handle RX data */ 1230 spin_lock(&serial->serial_lock); 1231 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1232 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1233 spin_unlock(&serial->serial_lock); 1234} 1235 1236/* 1237 * This needs to be a tasklet otherwise we will 1238 * end up recursively calling this function. 1239 */ 1240static void hso_unthrottle_tasklet(struct hso_serial *serial) 1241{ 1242 unsigned long flags; 1243 1244 spin_lock_irqsave(&serial->serial_lock, flags); 1245 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1246 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1247 else 1248 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1249 spin_unlock_irqrestore(&serial->serial_lock, flags); 1250} 1251 1252static void hso_unthrottle(struct tty_struct *tty) 1253{ 1254 struct hso_serial *serial = tty->driver_data; 1255 1256 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1257} 1258 1259/* open the requested serial port */ 1260static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1261{ 1262 struct hso_serial *serial = get_serial_by_index(tty->index); 1263 int result; 1264 1265 /* sanity check */ 1266 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1267 WARN_ON(1); 1268 tty->driver_data = NULL; 1269 D1("Failed to open port"); 1270 return -ENODEV; 1271 } 1272 1273 mutex_lock(&serial->parent->mutex); 1274 result = usb_autopm_get_interface(serial->parent->interface); 1275 if (result < 0) 1276 goto err_out; 1277 1278 D1("Opening %d", serial->minor); 1279 1280 /* setup */ 1281 tty->driver_data = serial; 1282 tty_port_tty_set(&serial->port, tty); 1283 1284 /* check for port already opened, if not set the termios */ 1285 serial->port.count++; 1286 if (serial->port.count == 1) { 1287 serial->rx_state = RX_IDLE; 1288 /* Force default termio settings */ 1289 _hso_serial_set_termios(tty, NULL); 1290 tasklet_init(&serial->unthrottle_tasklet, 1291 (void (*)(unsigned long))hso_unthrottle_tasklet, 1292 (unsigned long)serial); 1293 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1294 if (result) { 1295 hso_stop_serial_device(serial->parent); 1296 serial->port.count--; 1297 } else { 1298 kref_get(&serial->parent->ref); 1299 } 1300 } else { 1301 D1("Port was already open"); 1302 } 1303 1304 usb_autopm_put_interface(serial->parent->interface); 1305 1306 /* done */ 1307 if (result) 1308 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1309err_out: 1310 mutex_unlock(&serial->parent->mutex); 1311 return result; 1312} 1313 1314/* close the requested serial port */ 1315static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1316{ 1317 struct hso_serial *serial = tty->driver_data; 1318 u8 usb_gone; 1319 1320 D1("Closing serial port"); 1321 1322 /* Open failed, no close cleanup required */ 1323 if (serial == NULL) 1324 return; 1325 1326 mutex_lock(&serial->parent->mutex); 1327 usb_gone = serial->parent->usb_gone; 1328 1329 if (!usb_gone) 1330 usb_autopm_get_interface(serial->parent->interface); 1331 1332 /* reset the rts and dtr */ 1333 /* do the actual close */ 1334 serial->port.count--; 1335 1336 if (serial->port.count <= 0) { 1337 serial->port.count = 0; 1338 tty_port_tty_set(&serial->port, NULL); 1339 if (!usb_gone) 1340 hso_stop_serial_device(serial->parent); 1341 tasklet_kill(&serial->unthrottle_tasklet); 1342 } 1343 1344 if (!usb_gone) 1345 usb_autopm_put_interface(serial->parent->interface); 1346 1347 mutex_unlock(&serial->parent->mutex); 1348} 1349 1350/* close the requested serial port */ 1351static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1352 int count) 1353{ 1354 struct hso_serial *serial = tty->driver_data; 1355 int space, tx_bytes; 1356 unsigned long flags; 1357 1358 /* sanity check */ 1359 if (serial == NULL) { 1360 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1361 return -ENODEV; 1362 } 1363 1364 spin_lock_irqsave(&serial->serial_lock, flags); 1365 1366 space = serial->tx_data_length - serial->tx_buffer_count; 1367 tx_bytes = (count < space) ? count : space; 1368 1369 if (!tx_bytes) 1370 goto out; 1371 1372 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1373 serial->tx_buffer_count += tx_bytes; 1374 1375out: 1376 spin_unlock_irqrestore(&serial->serial_lock, flags); 1377 1378 hso_kick_transmit(serial); 1379 /* done */ 1380 return tx_bytes; 1381} 1382 1383/* how much room is there for writing */ 1384static int hso_serial_write_room(struct tty_struct *tty) 1385{ 1386 struct hso_serial *serial = tty->driver_data; 1387 int room; 1388 unsigned long flags; 1389 1390 spin_lock_irqsave(&serial->serial_lock, flags); 1391 room = serial->tx_data_length - serial->tx_buffer_count; 1392 spin_unlock_irqrestore(&serial->serial_lock, flags); 1393 1394 /* return free room */ 1395 return room; 1396} 1397 1398static void hso_serial_cleanup(struct tty_struct *tty) 1399{ 1400 struct hso_serial *serial = tty->driver_data; 1401 1402 if (!serial) 1403 return; 1404 1405 kref_put(&serial->parent->ref, hso_serial_ref_free); 1406} 1407 1408/* setup the term */ 1409static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1410{ 1411 struct hso_serial *serial = tty->driver_data; 1412 unsigned long flags; 1413 1414 if (old) 1415 D5("Termios called with: cflags new[%d] - old[%d]", 1416 tty->termios.c_cflag, old->c_cflag); 1417 1418 /* the actual setup */ 1419 spin_lock_irqsave(&serial->serial_lock, flags); 1420 if (serial->port.count) 1421 _hso_serial_set_termios(tty, old); 1422 else 1423 tty->termios = *old; 1424 spin_unlock_irqrestore(&serial->serial_lock, flags); 1425 1426 /* done */ 1427} 1428 1429/* how many characters in the buffer */ 1430static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1431{ 1432 struct hso_serial *serial = tty->driver_data; 1433 int chars; 1434 unsigned long flags; 1435 1436 /* sanity check */ 1437 if (serial == NULL) 1438 return 0; 1439 1440 spin_lock_irqsave(&serial->serial_lock, flags); 1441 chars = serial->tx_buffer_count; 1442 spin_unlock_irqrestore(&serial->serial_lock, flags); 1443 1444 return chars; 1445} 1446static int tiocmget_submit_urb(struct hso_serial *serial, 1447 struct hso_tiocmget *tiocmget, 1448 struct usb_device *usb) 1449{ 1450 int result; 1451 1452 if (serial->parent->usb_gone) 1453 return -ENODEV; 1454 usb_fill_int_urb(tiocmget->urb, usb, 1455 usb_rcvintpipe(usb, 1456 tiocmget->endp-> 1457 bEndpointAddress & 0x7F), 1458 &tiocmget->serial_state_notification, 1459 sizeof(struct hso_serial_state_notification), 1460 tiocmget_intr_callback, serial, 1461 tiocmget->endp->bInterval); 1462 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1463 if (result) { 1464 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1465 result); 1466 } 1467 return result; 1468 1469} 1470 1471static void tiocmget_intr_callback(struct urb *urb) 1472{ 1473 struct hso_serial *serial = urb->context; 1474 struct hso_tiocmget *tiocmget; 1475 int status = urb->status; 1476 u16 UART_state_bitmap, prev_UART_state_bitmap; 1477 struct uart_icount *icount; 1478 struct hso_serial_state_notification *serial_state_notification; 1479 struct usb_device *usb; 1480 struct usb_interface *interface; 1481 int if_num; 1482 1483 /* Sanity checks */ 1484 if (!serial) 1485 return; 1486 if (status) { 1487 handle_usb_error(status, __func__, serial->parent); 1488 return; 1489 } 1490 1491 /* tiocmget is only supported on HSO_PORT_MODEM */ 1492 tiocmget = serial->tiocmget; 1493 if (!tiocmget) 1494 return; 1495 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1496 1497 usb = serial->parent->usb; 1498 interface = serial->parent->interface; 1499 1500 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1501 1502 /* wIndex should be the USB interface number of the port to which the 1503 * notification applies, which should always be the Modem port. 1504 */ 1505 serial_state_notification = &tiocmget->serial_state_notification; 1506 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1507 serial_state_notification->bNotification != B_NOTIFICATION || 1508 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1509 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1510 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1511 dev_warn(&usb->dev, 1512 "hso received invalid serial state notification\n"); 1513 DUMP(serial_state_notification, 1514 sizeof(struct hso_serial_state_notification)); 1515 } else { 1516 1517 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1518 UART_state_bitmap); 1519 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1520 icount = &tiocmget->icount; 1521 spin_lock(&serial->serial_lock); 1522 if ((UART_state_bitmap & B_OVERRUN) != 1523 (prev_UART_state_bitmap & B_OVERRUN)) 1524 icount->parity++; 1525 if ((UART_state_bitmap & B_PARITY) != 1526 (prev_UART_state_bitmap & B_PARITY)) 1527 icount->parity++; 1528 if ((UART_state_bitmap & B_FRAMING) != 1529 (prev_UART_state_bitmap & B_FRAMING)) 1530 icount->frame++; 1531 if ((UART_state_bitmap & B_RING_SIGNAL) && 1532 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1533 icount->rng++; 1534 if ((UART_state_bitmap & B_BREAK) != 1535 (prev_UART_state_bitmap & B_BREAK)) 1536 icount->brk++; 1537 if ((UART_state_bitmap & B_TX_CARRIER) != 1538 (prev_UART_state_bitmap & B_TX_CARRIER)) 1539 icount->dsr++; 1540 if ((UART_state_bitmap & B_RX_CARRIER) != 1541 (prev_UART_state_bitmap & B_RX_CARRIER)) 1542 icount->dcd++; 1543 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1544 spin_unlock(&serial->serial_lock); 1545 tiocmget->intr_completed = 1; 1546 wake_up_interruptible(&tiocmget->waitq); 1547 } 1548 memset(serial_state_notification, 0, 1549 sizeof(struct hso_serial_state_notification)); 1550 tiocmget_submit_urb(serial, 1551 tiocmget, 1552 serial->parent->usb); 1553} 1554 1555/* 1556 * next few functions largely stolen from drivers/serial/serial_core.c 1557 */ 1558/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1559 * - mask passed in arg for lines of interest 1560 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1561 * Caller should use TIOCGICOUNT to see which one it was 1562 */ 1563static int 1564hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1565{ 1566 DECLARE_WAITQUEUE(wait, current); 1567 struct uart_icount cprev, cnow; 1568 struct hso_tiocmget *tiocmget; 1569 int ret; 1570 1571 tiocmget = serial->tiocmget; 1572 if (!tiocmget) 1573 return -ENOENT; 1574 /* 1575 * note the counters on entry 1576 */ 1577 spin_lock_irq(&serial->serial_lock); 1578 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1579 spin_unlock_irq(&serial->serial_lock); 1580 add_wait_queue(&tiocmget->waitq, &wait); 1581 for (;;) { 1582 spin_lock_irq(&serial->serial_lock); 1583 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1584 spin_unlock_irq(&serial->serial_lock); 1585 set_current_state(TASK_INTERRUPTIBLE); 1586 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1587 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1588 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1589 ret = 0; 1590 break; 1591 } 1592 schedule(); 1593 /* see if a signal did it */ 1594 if (signal_pending(current)) { 1595 ret = -ERESTARTSYS; 1596 break; 1597 } 1598 cprev = cnow; 1599 } 1600 __set_current_state(TASK_RUNNING); 1601 remove_wait_queue(&tiocmget->waitq, &wait); 1602 1603 return ret; 1604} 1605 1606/* 1607 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1608 * Return: write counters to the user passed counter struct 1609 * NB: both 1->0 and 0->1 transitions are counted except for 1610 * RI where only 0->1 is counted. 1611 */ 1612static int hso_get_count(struct tty_struct *tty, 1613 struct serial_icounter_struct *icount) 1614{ 1615 struct uart_icount cnow; 1616 struct hso_serial *serial = tty->driver_data; 1617 struct hso_tiocmget *tiocmget = serial->tiocmget; 1618 1619 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1620 1621 if (!tiocmget) 1622 return -ENOENT; 1623 spin_lock_irq(&serial->serial_lock); 1624 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1625 spin_unlock_irq(&serial->serial_lock); 1626 1627 icount->cts = cnow.cts; 1628 icount->dsr = cnow.dsr; 1629 icount->rng = cnow.rng; 1630 icount->dcd = cnow.dcd; 1631 icount->rx = cnow.rx; 1632 icount->tx = cnow.tx; 1633 icount->frame = cnow.frame; 1634 icount->overrun = cnow.overrun; 1635 icount->parity = cnow.parity; 1636 icount->brk = cnow.brk; 1637 icount->buf_overrun = cnow.buf_overrun; 1638 1639 return 0; 1640} 1641 1642 1643static int hso_serial_tiocmget(struct tty_struct *tty) 1644{ 1645 int retval; 1646 struct hso_serial *serial = tty->driver_data; 1647 struct hso_tiocmget *tiocmget; 1648 u16 UART_state_bitmap; 1649 1650 /* sanity check */ 1651 if (!serial) { 1652 D1("no tty structures"); 1653 return -EINVAL; 1654 } 1655 spin_lock_irq(&serial->serial_lock); 1656 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1657 ((serial->dtr_state) ? TIOCM_DTR : 0); 1658 tiocmget = serial->tiocmget; 1659 if (tiocmget) { 1660 1661 UART_state_bitmap = le16_to_cpu( 1662 tiocmget->prev_UART_state_bitmap); 1663 if (UART_state_bitmap & B_RING_SIGNAL) 1664 retval |= TIOCM_RNG; 1665 if (UART_state_bitmap & B_RX_CARRIER) 1666 retval |= TIOCM_CD; 1667 if (UART_state_bitmap & B_TX_CARRIER) 1668 retval |= TIOCM_DSR; 1669 } 1670 spin_unlock_irq(&serial->serial_lock); 1671 return retval; 1672} 1673 1674static int hso_serial_tiocmset(struct tty_struct *tty, 1675 unsigned int set, unsigned int clear) 1676{ 1677 int val = 0; 1678 unsigned long flags; 1679 int if_num; 1680 struct hso_serial *serial = tty->driver_data; 1681 struct usb_interface *interface; 1682 1683 /* sanity check */ 1684 if (!serial) { 1685 D1("no tty structures"); 1686 return -EINVAL; 1687 } 1688 1689 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1690 return -EINVAL; 1691 1692 interface = serial->parent->interface; 1693 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1694 1695 spin_lock_irqsave(&serial->serial_lock, flags); 1696 if (set & TIOCM_RTS) 1697 serial->rts_state = 1; 1698 if (set & TIOCM_DTR) 1699 serial->dtr_state = 1; 1700 1701 if (clear & TIOCM_RTS) 1702 serial->rts_state = 0; 1703 if (clear & TIOCM_DTR) 1704 serial->dtr_state = 0; 1705 1706 if (serial->dtr_state) 1707 val |= 0x01; 1708 if (serial->rts_state) 1709 val |= 0x02; 1710 1711 spin_unlock_irqrestore(&serial->serial_lock, flags); 1712 1713 return usb_control_msg(serial->parent->usb, 1714 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1715 0x21, val, if_num, NULL, 0, 1716 USB_CTRL_SET_TIMEOUT); 1717} 1718 1719static int hso_serial_ioctl(struct tty_struct *tty, 1720 unsigned int cmd, unsigned long arg) 1721{ 1722 struct hso_serial *serial = tty->driver_data; 1723 int ret = 0; 1724 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1725 1726 if (!serial) 1727 return -ENODEV; 1728 switch (cmd) { 1729 case TIOCMIWAIT: 1730 ret = hso_wait_modem_status(serial, arg); 1731 break; 1732 default: 1733 ret = -ENOIOCTLCMD; 1734 break; 1735 } 1736 return ret; 1737} 1738 1739 1740/* starts a transmit */ 1741static void hso_kick_transmit(struct hso_serial *serial) 1742{ 1743 u8 *temp; 1744 unsigned long flags; 1745 int res; 1746 1747 spin_lock_irqsave(&serial->serial_lock, flags); 1748 if (!serial->tx_buffer_count) 1749 goto out; 1750 1751 if (serial->tx_urb_used) 1752 goto out; 1753 1754 /* Wakeup USB interface if necessary */ 1755 if (hso_get_activity(serial->parent) == -EAGAIN) 1756 goto out; 1757 1758 /* Switch pointers around to avoid memcpy */ 1759 temp = serial->tx_buffer; 1760 serial->tx_buffer = serial->tx_data; 1761 serial->tx_data = temp; 1762 serial->tx_data_count = serial->tx_buffer_count; 1763 serial->tx_buffer_count = 0; 1764 1765 /* If temp is set, it means we switched buffers */ 1766 if (temp && serial->write_data) { 1767 res = serial->write_data(serial); 1768 if (res >= 0) 1769 serial->tx_urb_used = 1; 1770 } 1771out: 1772 spin_unlock_irqrestore(&serial->serial_lock, flags); 1773} 1774 1775/* make a request (for reading and writing data to muxed serial port) */ 1776static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1777 struct urb *ctrl_urb, 1778 struct usb_ctrlrequest *ctrl_req, 1779 u8 *ctrl_urb_data, u32 size) 1780{ 1781 int result; 1782 int pipe; 1783 1784 /* Sanity check */ 1785 if (!serial || !ctrl_urb || !ctrl_req) { 1786 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1787 return -EINVAL; 1788 } 1789 1790 /* initialize */ 1791 ctrl_req->wValue = 0; 1792 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1793 ctrl_req->wLength = cpu_to_le16(size); 1794 1795 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1796 /* Reading command */ 1797 ctrl_req->bRequestType = USB_DIR_IN | 1798 USB_TYPE_OPTION_VENDOR | 1799 USB_RECIP_INTERFACE; 1800 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1801 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1802 } else { 1803 /* Writing command */ 1804 ctrl_req->bRequestType = USB_DIR_OUT | 1805 USB_TYPE_OPTION_VENDOR | 1806 USB_RECIP_INTERFACE; 1807 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1808 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1809 } 1810 /* syslog */ 1811 D2("%s command (%02x) len: %d, port: %d", 1812 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1813 ctrl_req->bRequestType, ctrl_req->wLength, port); 1814 1815 /* Load ctrl urb */ 1816 ctrl_urb->transfer_flags = 0; 1817 usb_fill_control_urb(ctrl_urb, 1818 serial->parent->usb, 1819 pipe, 1820 (u8 *) ctrl_req, 1821 ctrl_urb_data, size, ctrl_callback, serial); 1822 /* Send it on merry way */ 1823 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1824 if (result) { 1825 dev_err(&ctrl_urb->dev->dev, 1826 "%s failed submit ctrl_urb %d type %d\n", __func__, 1827 result, type); 1828 return result; 1829 } 1830 1831 /* done */ 1832 return size; 1833} 1834 1835/* called by intr_callback when read occurs */ 1836static int hso_mux_serial_read(struct hso_serial *serial) 1837{ 1838 if (!serial) 1839 return -EINVAL; 1840 1841 /* clean data */ 1842 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1843 /* make the request */ 1844 1845 if (serial->num_rx_urbs != 1) { 1846 dev_err(&serial->parent->interface->dev, 1847 "ERROR: mux'd reads with multiple buffers " 1848 "not possible\n"); 1849 return 0; 1850 } 1851 return mux_device_request(serial, 1852 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1853 serial->parent->port_spec & HSO_PORT_MASK, 1854 serial->rx_urb[0], 1855 &serial->ctrl_req_rx, 1856 serial->rx_data[0], serial->rx_data_length); 1857} 1858 1859/* used for muxed serial port callback (muxed serial read) */ 1860static void intr_callback(struct urb *urb) 1861{ 1862 struct hso_shared_int *shared_int = urb->context; 1863 struct hso_serial *serial; 1864 unsigned char *port_req; 1865 int status = urb->status; 1866 int i; 1867 1868 usb_mark_last_busy(urb->dev); 1869 1870 /* sanity check */ 1871 if (!shared_int) 1872 return; 1873 1874 /* status check */ 1875 if (status) { 1876 handle_usb_error(status, __func__, NULL); 1877 return; 1878 } 1879 D4("\n--- Got intr callback 0x%02X ---", status); 1880 1881 /* what request? */ 1882 port_req = urb->transfer_buffer; 1883 D4(" port_req = 0x%.2X\n", *port_req); 1884 /* loop over all muxed ports to find the one sending this */ 1885 for (i = 0; i < 8; i++) { 1886 /* max 8 channels on MUX */ 1887 if (*port_req & (1 << i)) { 1888 serial = get_serial_by_shared_int_and_type(shared_int, 1889 (1 << i)); 1890 if (serial != NULL) { 1891 D1("Pending read interrupt on port %d\n", i); 1892 spin_lock(&serial->serial_lock); 1893 if (serial->rx_state == RX_IDLE && 1894 serial->port.count > 0) { 1895 /* Setup and send a ctrl req read on 1896 * port i */ 1897 if (!serial->rx_urb_filled[0]) { 1898 serial->rx_state = RX_SENT; 1899 hso_mux_serial_read(serial); 1900 } else 1901 serial->rx_state = RX_PENDING; 1902 } else { 1903 D1("Already a read pending on " 1904 "port %d or port not open\n", i); 1905 } 1906 spin_unlock(&serial->serial_lock); 1907 } 1908 } 1909 } 1910 /* Resubmit interrupt urb */ 1911 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1912} 1913 1914/* called for writing to muxed serial port */ 1915static int hso_mux_serial_write_data(struct hso_serial *serial) 1916{ 1917 if (NULL == serial) 1918 return -EINVAL; 1919 1920 return mux_device_request(serial, 1921 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1922 serial->parent->port_spec & HSO_PORT_MASK, 1923 serial->tx_urb, 1924 &serial->ctrl_req_tx, 1925 serial->tx_data, serial->tx_data_count); 1926} 1927 1928/* write callback for Diag and CS port */ 1929static void hso_std_serial_write_bulk_callback(struct urb *urb) 1930{ 1931 struct hso_serial *serial = urb->context; 1932 int status = urb->status; 1933 1934 /* sanity check */ 1935 if (!serial) { 1936 D1("serial == NULL"); 1937 return; 1938 } 1939 1940 spin_lock(&serial->serial_lock); 1941 serial->tx_urb_used = 0; 1942 spin_unlock(&serial->serial_lock); 1943 if (status) { 1944 handle_usb_error(status, __func__, serial->parent); 1945 return; 1946 } 1947 hso_put_activity(serial->parent); 1948 tty_port_tty_wakeup(&serial->port); 1949 hso_kick_transmit(serial); 1950 1951 D1(" "); 1952} 1953 1954/* called for writing diag or CS serial port */ 1955static int hso_std_serial_write_data(struct hso_serial *serial) 1956{ 1957 int count = serial->tx_data_count; 1958 int result; 1959 1960 usb_fill_bulk_urb(serial->tx_urb, 1961 serial->parent->usb, 1962 usb_sndbulkpipe(serial->parent->usb, 1963 serial->out_endp-> 1964 bEndpointAddress & 0x7F), 1965 serial->tx_data, serial->tx_data_count, 1966 hso_std_serial_write_bulk_callback, serial); 1967 1968 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1969 if (result) { 1970 dev_warn(&serial->parent->usb->dev, 1971 "Failed to submit urb - res %d\n", result); 1972 return result; 1973 } 1974 1975 return count; 1976} 1977 1978/* callback after read or write on muxed serial port */ 1979static void ctrl_callback(struct urb *urb) 1980{ 1981 struct hso_serial *serial = urb->context; 1982 struct usb_ctrlrequest *req; 1983 int status = urb->status; 1984 1985 /* sanity check */ 1986 if (!serial) 1987 return; 1988 1989 spin_lock(&serial->serial_lock); 1990 serial->tx_urb_used = 0; 1991 spin_unlock(&serial->serial_lock); 1992 if (status) { 1993 handle_usb_error(status, __func__, serial->parent); 1994 return; 1995 } 1996 1997 /* what request? */ 1998 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1999 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2000 D4("Actual length of urb = %d\n", urb->actual_length); 2001 DUMP1(urb->transfer_buffer, urb->actual_length); 2002 2003 if (req->bRequestType == 2004 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2005 /* response to a read command */ 2006 serial->rx_urb_filled[0] = 1; 2007 spin_lock(&serial->serial_lock); 2008 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2009 spin_unlock(&serial->serial_lock); 2010 } else { 2011 hso_put_activity(serial->parent); 2012 tty_port_tty_wakeup(&serial->port); 2013 /* response to a write command */ 2014 hso_kick_transmit(serial); 2015 } 2016} 2017 2018/* handle RX data for serial port */ 2019static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2020{ 2021 struct tty_struct *tty; 2022 int count; 2023 2024 /* Sanity check */ 2025 if (urb == NULL || serial == NULL) { 2026 D1("serial = NULL"); 2027 return -2; 2028 } 2029 2030 tty = tty_port_tty_get(&serial->port); 2031 2032 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2033 tty_kref_put(tty); 2034 return -1; 2035 } 2036 2037 /* Push data to tty */ 2038 D1("data to push to tty"); 2039 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2040 if (count >= urb->actual_length) { 2041 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2042 urb->actual_length); 2043 tty_flip_buffer_push(&serial->port); 2044 } else { 2045 dev_warn(&serial->parent->usb->dev, 2046 "dropping data, %d bytes lost\n", urb->actual_length); 2047 } 2048 2049 tty_kref_put(tty); 2050 2051 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2052 2053 return 0; 2054} 2055 2056 2057/* Base driver functions */ 2058 2059static void hso_log_port(struct hso_device *hso_dev) 2060{ 2061 char *port_type; 2062 char port_dev[20]; 2063 2064 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2065 case HSO_PORT_CONTROL: 2066 port_type = "Control"; 2067 break; 2068 case HSO_PORT_APP: 2069 port_type = "Application"; 2070 break; 2071 case HSO_PORT_GPS: 2072 port_type = "GPS"; 2073 break; 2074 case HSO_PORT_GPS_CONTROL: 2075 port_type = "GPS control"; 2076 break; 2077 case HSO_PORT_APP2: 2078 port_type = "Application2"; 2079 break; 2080 case HSO_PORT_PCSC: 2081 port_type = "PCSC"; 2082 break; 2083 case HSO_PORT_DIAG: 2084 port_type = "Diagnostic"; 2085 break; 2086 case HSO_PORT_DIAG2: 2087 port_type = "Diagnostic2"; 2088 break; 2089 case HSO_PORT_MODEM: 2090 port_type = "Modem"; 2091 break; 2092 case HSO_PORT_NETWORK: 2093 port_type = "Network"; 2094 break; 2095 default: 2096 port_type = "Unknown"; 2097 break; 2098 } 2099 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2100 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2101 } else 2102 sprintf(port_dev, "/dev/%s%d", tty_filename, 2103 dev2ser(hso_dev)->minor); 2104 2105 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2106 port_type, port_dev); 2107} 2108 2109static int hso_start_net_device(struct hso_device *hso_dev) 2110{ 2111 int i, result = 0; 2112 struct hso_net *hso_net = dev2net(hso_dev); 2113 2114 if (!hso_net) 2115 return -ENODEV; 2116 2117 /* send URBs for all read buffers */ 2118 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2119 2120 /* Prep a receive URB */ 2121 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2122 hso_dev->usb, 2123 usb_rcvbulkpipe(hso_dev->usb, 2124 hso_net->in_endp-> 2125 bEndpointAddress & 0x7F), 2126 hso_net->mux_bulk_rx_buf_pool[i], 2127 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2128 hso_net); 2129 2130 /* Put it out there so the device can send us stuff */ 2131 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2132 GFP_NOIO); 2133 if (result) 2134 dev_warn(&hso_dev->usb->dev, 2135 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2136 i, result); 2137 } 2138 2139 return result; 2140} 2141 2142static int hso_stop_net_device(struct hso_device *hso_dev) 2143{ 2144 int i; 2145 struct hso_net *hso_net = dev2net(hso_dev); 2146 2147 if (!hso_net) 2148 return -ENODEV; 2149 2150 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2151 if (hso_net->mux_bulk_rx_urb_pool[i]) 2152 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2153 2154 } 2155 if (hso_net->mux_bulk_tx_urb) 2156 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2157 2158 return 0; 2159} 2160 2161static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2162{ 2163 int i, result = 0; 2164 struct hso_serial *serial = dev2ser(hso_dev); 2165 2166 if (!serial) 2167 return -ENODEV; 2168 2169 /* If it is not the MUX port fill in and submit a bulk urb (already 2170 * allocated in hso_serial_start) */ 2171 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2172 for (i = 0; i < serial->num_rx_urbs; i++) { 2173 usb_fill_bulk_urb(serial->rx_urb[i], 2174 serial->parent->usb, 2175 usb_rcvbulkpipe(serial->parent->usb, 2176 serial->in_endp-> 2177 bEndpointAddress & 2178 0x7F), 2179 serial->rx_data[i], 2180 serial->rx_data_length, 2181 hso_std_serial_read_bulk_callback, 2182 serial); 2183 result = usb_submit_urb(serial->rx_urb[i], flags); 2184 if (result) { 2185 dev_warn(&serial->parent->usb->dev, 2186 "Failed to submit urb - res %d\n", 2187 result); 2188 break; 2189 } 2190 } 2191 } else { 2192 mutex_lock(&serial->shared_int->shared_int_lock); 2193 if (!serial->shared_int->use_count) { 2194 result = 2195 hso_mux_submit_intr_urb(serial->shared_int, 2196 hso_dev->usb, flags); 2197 } 2198 serial->shared_int->use_count++; 2199 mutex_unlock(&serial->shared_int->shared_int_lock); 2200 } 2201 if (serial->tiocmget) 2202 tiocmget_submit_urb(serial, 2203 serial->tiocmget, 2204 serial->parent->usb); 2205 return result; 2206} 2207 2208static int hso_stop_serial_device(struct hso_device *hso_dev) 2209{ 2210 int i; 2211 struct hso_serial *serial = dev2ser(hso_dev); 2212 struct hso_tiocmget *tiocmget; 2213 2214 if (!serial) 2215 return -ENODEV; 2216 2217 for (i = 0; i < serial->num_rx_urbs; i++) { 2218 if (serial->rx_urb[i]) { 2219 usb_kill_urb(serial->rx_urb[i]); 2220 serial->rx_urb_filled[i] = 0; 2221 } 2222 } 2223 serial->curr_rx_urb_idx = 0; 2224 2225 if (serial->tx_urb) 2226 usb_kill_urb(serial->tx_urb); 2227 2228 if (serial->shared_int) { 2229 mutex_lock(&serial->shared_int->shared_int_lock); 2230 if (serial->shared_int->use_count && 2231 (--serial->shared_int->use_count == 0)) { 2232 struct urb *urb; 2233 2234 urb = serial->shared_int->shared_intr_urb; 2235 if (urb) 2236 usb_kill_urb(urb); 2237 } 2238 mutex_unlock(&serial->shared_int->shared_int_lock); 2239 } 2240 tiocmget = serial->tiocmget; 2241 if (tiocmget) { 2242 wake_up_interruptible(&tiocmget->waitq); 2243 usb_kill_urb(tiocmget->urb); 2244 } 2245 2246 return 0; 2247} 2248 2249static void hso_serial_tty_unregister(struct hso_serial *serial) 2250{ 2251 tty_unregister_device(tty_drv, serial->minor); 2252} 2253 2254static void hso_serial_common_free(struct hso_serial *serial) 2255{ 2256 int i; 2257 2258 for (i = 0; i < serial->num_rx_urbs; i++) { 2259 /* unlink and free RX URB */ 2260 usb_free_urb(serial->rx_urb[i]); 2261 /* free the RX buffer */ 2262 kfree(serial->rx_data[i]); 2263 } 2264 2265 /* unlink and free TX URB */ 2266 usb_free_urb(serial->tx_urb); 2267 kfree(serial->tx_buffer); 2268 kfree(serial->tx_data); 2269 tty_port_destroy(&serial->port); 2270} 2271 2272static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2273 int rx_size, int tx_size) 2274{ 2275 struct device *dev; 2276 int minor; 2277 int i; 2278 2279 tty_port_init(&serial->port); 2280 2281 minor = get_free_serial_index(); 2282 if (minor < 0) 2283 goto exit; 2284 2285 /* register our minor number */ 2286 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2287 tty_drv, minor, &serial->parent->interface->dev, 2288 serial->parent, hso_serial_dev_groups); 2289 dev = serial->parent->dev; 2290 2291 /* fill in specific data for later use */ 2292 serial->minor = minor; 2293 serial->magic = HSO_SERIAL_MAGIC; 2294 spin_lock_init(&serial->serial_lock); 2295 serial->num_rx_urbs = num_urbs; 2296 2297 /* RX, allocate urb and initialize */ 2298 2299 /* prepare our RX buffer */ 2300 serial->rx_data_length = rx_size; 2301 for (i = 0; i < serial->num_rx_urbs; i++) { 2302 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2303 if (!serial->rx_urb[i]) { 2304 dev_err(dev, "Could not allocate urb?\n"); 2305 goto exit; 2306 } 2307 serial->rx_urb[i]->transfer_buffer = NULL; 2308 serial->rx_urb[i]->transfer_buffer_length = 0; 2309 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2310 GFP_KERNEL); 2311 if (!serial->rx_data[i]) 2312 goto exit; 2313 } 2314 2315 /* TX, allocate urb and initialize */ 2316 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2317 if (!serial->tx_urb) { 2318 dev_err(dev, "Could not allocate urb?\n"); 2319 goto exit; 2320 } 2321 serial->tx_urb->transfer_buffer = NULL; 2322 serial->tx_urb->transfer_buffer_length = 0; 2323 /* prepare our TX buffer */ 2324 serial->tx_data_count = 0; 2325 serial->tx_buffer_count = 0; 2326 serial->tx_data_length = tx_size; 2327 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2328 if (!serial->tx_data) 2329 goto exit; 2330 2331 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2332 if (!serial->tx_buffer) 2333 goto exit; 2334 2335 return 0; 2336exit: 2337 hso_serial_tty_unregister(serial); 2338 hso_serial_common_free(serial); 2339 return -1; 2340} 2341 2342/* Creates a general hso device */ 2343static struct hso_device *hso_create_device(struct usb_interface *intf, 2344 int port_spec) 2345{ 2346 struct hso_device *hso_dev; 2347 2348 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2349 if (!hso_dev) 2350 return NULL; 2351 2352 hso_dev->port_spec = port_spec; 2353 hso_dev->usb = interface_to_usbdev(intf); 2354 hso_dev->interface = intf; 2355 kref_init(&hso_dev->ref); 2356 mutex_init(&hso_dev->mutex); 2357 2358 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2359 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2360 2361 return hso_dev; 2362} 2363 2364/* Removes a network device in the network device table */ 2365static int remove_net_device(struct hso_device *hso_dev) 2366{ 2367 int i; 2368 2369 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2370 if (network_table[i] == hso_dev) { 2371 network_table[i] = NULL; 2372 break; 2373 } 2374 } 2375 if (i == HSO_MAX_NET_DEVICES) 2376 return -1; 2377 return 0; 2378} 2379 2380/* Frees our network device */ 2381static void hso_free_net_device(struct hso_device *hso_dev) 2382{ 2383 int i; 2384 struct hso_net *hso_net = dev2net(hso_dev); 2385 2386 if (!hso_net) 2387 return; 2388 2389 remove_net_device(hso_net->parent); 2390 2391 if (hso_net->net) 2392 unregister_netdev(hso_net->net); 2393 2394 /* start freeing */ 2395 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2396 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2397 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2398 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2399 } 2400 usb_free_urb(hso_net->mux_bulk_tx_urb); 2401 kfree(hso_net->mux_bulk_tx_buf); 2402 hso_net->mux_bulk_tx_buf = NULL; 2403 2404 if (hso_net->net) 2405 free_netdev(hso_net->net); 2406 2407 kfree(hso_dev); 2408} 2409 2410static const struct net_device_ops hso_netdev_ops = { 2411 .ndo_open = hso_net_open, 2412 .ndo_stop = hso_net_close, 2413 .ndo_start_xmit = hso_net_start_xmit, 2414 .ndo_tx_timeout = hso_net_tx_timeout, 2415}; 2416 2417/* initialize the network interface */ 2418static void hso_net_init(struct net_device *net) 2419{ 2420 struct hso_net *hso_net = netdev_priv(net); 2421 2422 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2423 2424 /* fill in the other fields */ 2425 net->netdev_ops = &hso_netdev_ops; 2426 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2427 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2428 net->type = ARPHRD_NONE; 2429 net->mtu = DEFAULT_MTU - 14; 2430 net->tx_queue_len = 10; 2431 net->ethtool_ops = &ops; 2432 2433 /* and initialize the semaphore */ 2434 spin_lock_init(&hso_net->net_lock); 2435} 2436 2437/* Adds a network device in the network device table */ 2438static int add_net_device(struct hso_device *hso_dev) 2439{ 2440 int i; 2441 2442 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2443 if (network_table[i] == NULL) { 2444 network_table[i] = hso_dev; 2445 break; 2446 } 2447 } 2448 if (i == HSO_MAX_NET_DEVICES) 2449 return -1; 2450 return 0; 2451} 2452 2453static int hso_rfkill_set_block(void *data, bool blocked) 2454{ 2455 struct hso_device *hso_dev = data; 2456 int enabled = !blocked; 2457 int rv; 2458 2459 mutex_lock(&hso_dev->mutex); 2460 if (hso_dev->usb_gone) 2461 rv = 0; 2462 else 2463 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2464 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2465 USB_CTRL_SET_TIMEOUT); 2466 mutex_unlock(&hso_dev->mutex); 2467 return rv; 2468} 2469 2470static const struct rfkill_ops hso_rfkill_ops = { 2471 .set_block = hso_rfkill_set_block, 2472}; 2473 2474/* Creates and sets up everything for rfkill */ 2475static void hso_create_rfkill(struct hso_device *hso_dev, 2476 struct usb_interface *interface) 2477{ 2478 struct hso_net *hso_net = dev2net(hso_dev); 2479 struct device *dev = &hso_net->net->dev; 2480 static u32 rfkill_counter; 2481 2482 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2483 rfkill_counter++); 2484 2485 hso_net->rfkill = rfkill_alloc(hso_net->name, 2486 &interface_to_usbdev(interface)->dev, 2487 RFKILL_TYPE_WWAN, 2488 &hso_rfkill_ops, hso_dev); 2489 if (!hso_net->rfkill) { 2490 dev_err(dev, "%s - Out of memory\n", __func__); 2491 return; 2492 } 2493 if (rfkill_register(hso_net->rfkill) < 0) { 2494 rfkill_destroy(hso_net->rfkill); 2495 hso_net->rfkill = NULL; 2496 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2497 return; 2498 } 2499} 2500 2501static struct device_type hso_type = { 2502 .name = "wwan", 2503}; 2504 2505/* Creates our network device */ 2506static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2507 int port_spec) 2508{ 2509 int result, i; 2510 struct net_device *net; 2511 struct hso_net *hso_net; 2512 struct hso_device *hso_dev; 2513 2514 hso_dev = hso_create_device(interface, port_spec); 2515 if (!hso_dev) 2516 return NULL; 2517 2518 /* allocate our network device, then we can put in our private data */ 2519 /* call hso_net_init to do the basic initialization */ 2520 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2521 hso_net_init); 2522 if (!net) { 2523 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2524 goto exit; 2525 } 2526 2527 hso_net = netdev_priv(net); 2528 2529 hso_dev->port_data.dev_net = hso_net; 2530 hso_net->net = net; 2531 hso_net->parent = hso_dev; 2532 2533 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2534 USB_DIR_IN); 2535 if (!hso_net->in_endp) { 2536 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2537 goto exit; 2538 } 2539 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2540 USB_DIR_OUT); 2541 if (!hso_net->out_endp) { 2542 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2543 goto exit; 2544 } 2545 SET_NETDEV_DEV(net, &interface->dev); 2546 SET_NETDEV_DEVTYPE(net, &hso_type); 2547 2548 /* registering our net device */ 2549 result = register_netdev(net); 2550 if (result) { 2551 dev_err(&interface->dev, "Failed to register device\n"); 2552 goto exit; 2553 } 2554 2555 /* start allocating */ 2556 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2557 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2558 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2559 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2560 goto exit; 2561 } 2562 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2563 GFP_KERNEL); 2564 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2565 goto exit; 2566 } 2567 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2568 if (!hso_net->mux_bulk_tx_urb) { 2569 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2570 goto exit; 2571 } 2572 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2573 if (!hso_net->mux_bulk_tx_buf) 2574 goto exit; 2575 2576 add_net_device(hso_dev); 2577 2578 hso_log_port(hso_dev); 2579 2580 hso_create_rfkill(hso_dev, interface); 2581 2582 return hso_dev; 2583exit: 2584 hso_free_net_device(hso_dev); 2585 return NULL; 2586} 2587 2588static void hso_free_tiomget(struct hso_serial *serial) 2589{ 2590 struct hso_tiocmget *tiocmget; 2591 if (!serial) 2592 return; 2593 tiocmget = serial->tiocmget; 2594 if (tiocmget) { 2595 usb_free_urb(tiocmget->urb); 2596 tiocmget->urb = NULL; 2597 serial->tiocmget = NULL; 2598 kfree(tiocmget); 2599 } 2600} 2601 2602/* Frees an AT channel ( goes for both mux and non-mux ) */ 2603static void hso_free_serial_device(struct hso_device *hso_dev) 2604{ 2605 struct hso_serial *serial = dev2ser(hso_dev); 2606 2607 if (!serial) 2608 return; 2609 2610 hso_serial_common_free(serial); 2611 2612 if (serial->shared_int) { 2613 mutex_lock(&serial->shared_int->shared_int_lock); 2614 if (--serial->shared_int->ref_count == 0) 2615 hso_free_shared_int(serial->shared_int); 2616 else 2617 mutex_unlock(&serial->shared_int->shared_int_lock); 2618 } 2619 hso_free_tiomget(serial); 2620 kfree(serial); 2621 kfree(hso_dev); 2622} 2623 2624/* Creates a bulk AT channel */ 2625static struct hso_device *hso_create_bulk_serial_device( 2626 struct usb_interface *interface, int port) 2627{ 2628 struct hso_device *hso_dev; 2629 struct hso_serial *serial; 2630 int num_urbs; 2631 struct hso_tiocmget *tiocmget; 2632 2633 hso_dev = hso_create_device(interface, port); 2634 if (!hso_dev) 2635 return NULL; 2636 2637 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2638 if (!serial) 2639 goto exit; 2640 2641 serial->parent = hso_dev; 2642 hso_dev->port_data.dev_serial = serial; 2643 2644 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2645 num_urbs = 2; 2646 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2647 GFP_KERNEL); 2648 /* it isn't going to break our heart if serial->tiocmget 2649 * allocation fails don't bother checking this. 2650 */ 2651 if (serial->tiocmget) { 2652 tiocmget = serial->tiocmget; 2653 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2654 if (tiocmget->urb) { 2655 mutex_init(&tiocmget->mutex); 2656 init_waitqueue_head(&tiocmget->waitq); 2657 tiocmget->endp = hso_get_ep( 2658 interface, 2659 USB_ENDPOINT_XFER_INT, 2660 USB_DIR_IN); 2661 } else 2662 hso_free_tiomget(serial); 2663 } 2664 } 2665 else 2666 num_urbs = 1; 2667 2668 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2669 BULK_URB_TX_SIZE)) 2670 goto exit; 2671 2672 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2673 USB_DIR_IN); 2674 if (!serial->in_endp) { 2675 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2676 goto exit2; 2677 } 2678 2679 if (! 2680 (serial->out_endp = 2681 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2682 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2683 goto exit2; 2684 } 2685 2686 serial->write_data = hso_std_serial_write_data; 2687 2688 /* and record this serial */ 2689 set_serial_by_index(serial->minor, serial); 2690 2691 /* setup the proc dirs and files if needed */ 2692 hso_log_port(hso_dev); 2693 2694 /* done, return it */ 2695 return hso_dev; 2696 2697exit2: 2698 hso_serial_tty_unregister(serial); 2699 hso_serial_common_free(serial); 2700exit: 2701 hso_free_tiomget(serial); 2702 kfree(serial); 2703 kfree(hso_dev); 2704 return NULL; 2705} 2706 2707/* Creates a multiplexed AT channel */ 2708static 2709struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2710 int port, 2711 struct hso_shared_int *mux) 2712{ 2713 struct hso_device *hso_dev; 2714 struct hso_serial *serial; 2715 int port_spec; 2716 2717 port_spec = HSO_INTF_MUX; 2718 port_spec &= ~HSO_PORT_MASK; 2719 2720 port_spec |= hso_mux_to_port(port); 2721 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2722 return NULL; 2723 2724 hso_dev = hso_create_device(interface, port_spec); 2725 if (!hso_dev) 2726 return NULL; 2727 2728 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2729 if (!serial) 2730 goto exit; 2731 2732 hso_dev->port_data.dev_serial = serial; 2733 serial->parent = hso_dev; 2734 2735 if (hso_serial_common_create 2736 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2737 goto exit; 2738 2739 serial->tx_data_length--; 2740 serial->write_data = hso_mux_serial_write_data; 2741 2742 serial->shared_int = mux; 2743 mutex_lock(&serial->shared_int->shared_int_lock); 2744 serial->shared_int->ref_count++; 2745 mutex_unlock(&serial->shared_int->shared_int_lock); 2746 2747 /* and record this serial */ 2748 set_serial_by_index(serial->minor, serial); 2749 2750 /* setup the proc dirs and files if needed */ 2751 hso_log_port(hso_dev); 2752 2753 /* done, return it */ 2754 return hso_dev; 2755 2756exit: 2757 if (serial) { 2758 tty_unregister_device(tty_drv, serial->minor); 2759 kfree(serial); 2760 } 2761 kfree(hso_dev); 2762 return NULL; 2763 2764} 2765 2766static void hso_free_shared_int(struct hso_shared_int *mux) 2767{ 2768 usb_free_urb(mux->shared_intr_urb); 2769 kfree(mux->shared_intr_buf); 2770 mutex_unlock(&mux->shared_int_lock); 2771 kfree(mux); 2772} 2773 2774static 2775struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2776{ 2777 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2778 2779 if (!mux) 2780 return NULL; 2781 2782 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2783 USB_DIR_IN); 2784 if (!mux->intr_endp) { 2785 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2786 goto exit; 2787 } 2788 2789 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2790 if (!mux->shared_intr_urb) { 2791 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2792 goto exit; 2793 } 2794 mux->shared_intr_buf = 2795 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2796 GFP_KERNEL); 2797 if (!mux->shared_intr_buf) 2798 goto exit; 2799 2800 mutex_init(&mux->shared_int_lock); 2801 2802 return mux; 2803 2804exit: 2805 kfree(mux->shared_intr_buf); 2806 usb_free_urb(mux->shared_intr_urb); 2807 kfree(mux); 2808 return NULL; 2809} 2810 2811/* Gets the port spec for a certain interface */ 2812static int hso_get_config_data(struct usb_interface *interface) 2813{ 2814 struct usb_device *usbdev = interface_to_usbdev(interface); 2815 u8 *config_data = kmalloc(17, GFP_KERNEL); 2816 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2817 s32 result; 2818 2819 if (!config_data) 2820 return -ENOMEM; 2821 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2822 0x86, 0xC0, 0, 0, config_data, 17, 2823 USB_CTRL_SET_TIMEOUT) != 0x11) { 2824 kfree(config_data); 2825 return -EIO; 2826 } 2827 2828 switch (config_data[if_num]) { 2829 case 0x0: 2830 result = 0; 2831 break; 2832 case 0x1: 2833 result = HSO_PORT_DIAG; 2834 break; 2835 case 0x2: 2836 result = HSO_PORT_GPS; 2837 break; 2838 case 0x3: 2839 result = HSO_PORT_GPS_CONTROL; 2840 break; 2841 case 0x4: 2842 result = HSO_PORT_APP; 2843 break; 2844 case 0x5: 2845 result = HSO_PORT_APP2; 2846 break; 2847 case 0x6: 2848 result = HSO_PORT_CONTROL; 2849 break; 2850 case 0x7: 2851 result = HSO_PORT_NETWORK; 2852 break; 2853 case 0x8: 2854 result = HSO_PORT_MODEM; 2855 break; 2856 case 0x9: 2857 result = HSO_PORT_MSD; 2858 break; 2859 case 0xa: 2860 result = HSO_PORT_PCSC; 2861 break; 2862 case 0xb: 2863 result = HSO_PORT_VOICE; 2864 break; 2865 default: 2866 result = 0; 2867 } 2868 2869 if (result) 2870 result |= HSO_INTF_BULK; 2871 2872 if (config_data[16] & 0x1) 2873 result |= HSO_INFO_CRC_BUG; 2874 2875 kfree(config_data); 2876 return result; 2877} 2878 2879/* called once for each interface upon device insertion */ 2880static int hso_probe(struct usb_interface *interface, 2881 const struct usb_device_id *id) 2882{ 2883 int mux, i, if_num, port_spec; 2884 unsigned char port_mask; 2885 struct hso_device *hso_dev = NULL; 2886 struct hso_shared_int *shared_int; 2887 struct hso_device *tmp_dev = NULL; 2888 2889 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2890 dev_err(&interface->dev, "Not our interface\n"); 2891 return -ENODEV; 2892 } 2893 2894 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2895 2896 /* Get the interface/port specification from either driver_info or from 2897 * the device itself */ 2898 if (id->driver_info) 2899 port_spec = ((u32 *)(id->driver_info))[if_num]; 2900 else 2901 port_spec = hso_get_config_data(interface); 2902 2903 /* Check if we need to switch to alt interfaces prior to port 2904 * configuration */ 2905 if (interface->num_altsetting > 1) 2906 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2907 interface->needs_remote_wakeup = 1; 2908 2909 /* Allocate new hso device(s) */ 2910 switch (port_spec & HSO_INTF_MASK) { 2911 case HSO_INTF_MUX: 2912 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2913 /* Create the network device */ 2914 if (!disable_net) { 2915 hso_dev = hso_create_net_device(interface, 2916 port_spec); 2917 if (!hso_dev) 2918 goto exit; 2919 tmp_dev = hso_dev; 2920 } 2921 } 2922 2923 if (hso_get_mux_ports(interface, &port_mask)) 2924 /* TODO: de-allocate everything */ 2925 goto exit; 2926 2927 shared_int = hso_create_shared_int(interface); 2928 if (!shared_int) 2929 goto exit; 2930 2931 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2932 if (port_mask & i) { 2933 hso_dev = hso_create_mux_serial_device( 2934 interface, i, shared_int); 2935 if (!hso_dev) 2936 goto exit; 2937 } 2938 } 2939 2940 if (tmp_dev) 2941 hso_dev = tmp_dev; 2942 break; 2943 2944 case HSO_INTF_BULK: 2945 /* It's a regular bulk interface */ 2946 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2947 if (!disable_net) 2948 hso_dev = 2949 hso_create_net_device(interface, port_spec); 2950 } else { 2951 hso_dev = 2952 hso_create_bulk_serial_device(interface, port_spec); 2953 } 2954 if (!hso_dev) 2955 goto exit; 2956 break; 2957 default: 2958 goto exit; 2959 } 2960 2961 /* save our data pointer in this device */ 2962 usb_set_intfdata(interface, hso_dev); 2963 2964 /* done */ 2965 return 0; 2966exit: 2967 hso_free_interface(interface); 2968 return -ENODEV; 2969} 2970 2971/* device removed, cleaning up */ 2972static void hso_disconnect(struct usb_interface *interface) 2973{ 2974 hso_free_interface(interface); 2975 2976 /* remove reference of our private data */ 2977 usb_set_intfdata(interface, NULL); 2978} 2979 2980static void async_get_intf(struct work_struct *data) 2981{ 2982 struct hso_device *hso_dev = 2983 container_of(data, struct hso_device, async_get_intf); 2984 usb_autopm_get_interface(hso_dev->interface); 2985} 2986 2987static void async_put_intf(struct work_struct *data) 2988{ 2989 struct hso_device *hso_dev = 2990 container_of(data, struct hso_device, async_put_intf); 2991 usb_autopm_put_interface(hso_dev->interface); 2992} 2993 2994static int hso_get_activity(struct hso_device *hso_dev) 2995{ 2996 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2997 if (!hso_dev->is_active) { 2998 hso_dev->is_active = 1; 2999 schedule_work(&hso_dev->async_get_intf); 3000 } 3001 } 3002 3003 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3004 return -EAGAIN; 3005 3006 usb_mark_last_busy(hso_dev->usb); 3007 3008 return 0; 3009} 3010 3011static int hso_put_activity(struct hso_device *hso_dev) 3012{ 3013 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3014 if (hso_dev->is_active) { 3015 hso_dev->is_active = 0; 3016 schedule_work(&hso_dev->async_put_intf); 3017 return -EAGAIN; 3018 } 3019 } 3020 hso_dev->is_active = 0; 3021 return 0; 3022} 3023 3024/* called by kernel when we need to suspend device */ 3025static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3026{ 3027 int i, result; 3028 3029 /* Stop all serial ports */ 3030 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3031 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3032 result = hso_stop_serial_device(serial_table[i]); 3033 if (result) 3034 goto out; 3035 } 3036 } 3037 3038 /* Stop all network ports */ 3039 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3040 if (network_table[i] && 3041 (network_table[i]->interface == iface)) { 3042 result = hso_stop_net_device(network_table[i]); 3043 if (result) 3044 goto out; 3045 } 3046 } 3047 3048out: 3049 return 0; 3050} 3051 3052/* called by kernel when we need to resume device */ 3053static int hso_resume(struct usb_interface *iface) 3054{ 3055 int i, result = 0; 3056 struct hso_net *hso_net; 3057 3058 /* Start all serial ports */ 3059 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3060 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3061 if (dev2ser(serial_table[i])->port.count) { 3062 result = 3063 hso_start_serial_device(serial_table[i], GFP_NOIO); 3064 hso_kick_transmit(dev2ser(serial_table[i])); 3065 if (result) 3066 goto out; 3067 } 3068 } 3069 } 3070 3071 /* Start all network ports */ 3072 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3073 if (network_table[i] && 3074 (network_table[i]->interface == iface)) { 3075 hso_net = dev2net(network_table[i]); 3076 if (hso_net->flags & IFF_UP) { 3077 /* First transmit any lingering data, 3078 then restart the device. */ 3079 if (hso_net->skb_tx_buf) { 3080 dev_dbg(&iface->dev, 3081 "Transmitting" 3082 " lingering data\n"); 3083 hso_net_start_xmit(hso_net->skb_tx_buf, 3084 hso_net->net); 3085 hso_net->skb_tx_buf = NULL; 3086 } 3087 result = hso_start_net_device(network_table[i]); 3088 if (result) 3089 goto out; 3090 } 3091 } 3092 } 3093 3094out: 3095 return result; 3096} 3097 3098static void hso_serial_ref_free(struct kref *ref) 3099{ 3100 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3101 3102 hso_free_serial_device(hso_dev); 3103} 3104 3105static void hso_free_interface(struct usb_interface *interface) 3106{ 3107 struct hso_serial *serial; 3108 int i; 3109 3110 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3111 if (serial_table[i] && 3112 (serial_table[i]->interface == interface)) { 3113 serial = dev2ser(serial_table[i]); 3114 tty_port_tty_hangup(&serial->port, false); 3115 mutex_lock(&serial->parent->mutex); 3116 serial->parent->usb_gone = 1; 3117 mutex_unlock(&serial->parent->mutex); 3118 cancel_work_sync(&serial_table[i]->async_put_intf); 3119 cancel_work_sync(&serial_table[i]->async_get_intf); 3120 hso_serial_tty_unregister(serial); 3121 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3122 set_serial_by_index(i, NULL); 3123 } 3124 } 3125 3126 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3127 if (network_table[i] && 3128 (network_table[i]->interface == interface)) { 3129 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3130 /* hso_stop_net_device doesn't stop the net queue since 3131 * traffic needs to start it again when suspended */ 3132 netif_stop_queue(dev2net(network_table[i])->net); 3133 hso_stop_net_device(network_table[i]); 3134 cancel_work_sync(&network_table[i]->async_put_intf); 3135 cancel_work_sync(&network_table[i]->async_get_intf); 3136 if (rfk) { 3137 rfkill_unregister(rfk); 3138 rfkill_destroy(rfk); 3139 } 3140 hso_free_net_device(network_table[i]); 3141 } 3142 } 3143} 3144 3145/* Helper functions */ 3146 3147/* Get the endpoint ! */ 3148static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3149 int type, int dir) 3150{ 3151 int i; 3152 struct usb_host_interface *iface = intf->cur_altsetting; 3153 struct usb_endpoint_descriptor *endp; 3154 3155 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3156 endp = &iface->endpoint[i].desc; 3157 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3158 (usb_endpoint_type(endp) == type)) 3159 return endp; 3160 } 3161 3162 return NULL; 3163} 3164 3165/* Get the byte that describes which ports are enabled */ 3166static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3167{ 3168 int i; 3169 struct usb_host_interface *iface = intf->cur_altsetting; 3170 3171 if (iface->extralen == 3) { 3172 *ports = iface->extra[2]; 3173 return 0; 3174 } 3175 3176 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3177 if (iface->endpoint[i].extralen == 3) { 3178 *ports = iface->endpoint[i].extra[2]; 3179 return 0; 3180 } 3181 } 3182 3183 return -1; 3184} 3185 3186/* interrupt urb needs to be submitted, used for serial read of muxed port */ 3187static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3188 struct usb_device *usb, gfp_t gfp) 3189{ 3190 int result; 3191 3192 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3193 usb_rcvintpipe(usb, 3194 shared_int->intr_endp->bEndpointAddress & 0x7F), 3195 shared_int->shared_intr_buf, 3196 1, 3197 intr_callback, shared_int, 3198 shared_int->intr_endp->bInterval); 3199 3200 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3201 if (result) 3202 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3203 result); 3204 3205 return result; 3206} 3207 3208/* operations setup of the serial interface */ 3209static const struct tty_operations hso_serial_ops = { 3210 .open = hso_serial_open, 3211 .close = hso_serial_close, 3212 .write = hso_serial_write, 3213 .write_room = hso_serial_write_room, 3214 .cleanup = hso_serial_cleanup, 3215 .ioctl = hso_serial_ioctl, 3216 .set_termios = hso_serial_set_termios, 3217 .chars_in_buffer = hso_serial_chars_in_buffer, 3218 .tiocmget = hso_serial_tiocmget, 3219 .tiocmset = hso_serial_tiocmset, 3220 .get_icount = hso_get_count, 3221 .unthrottle = hso_unthrottle 3222}; 3223 3224static struct usb_driver hso_driver = { 3225 .name = driver_name, 3226 .probe = hso_probe, 3227 .disconnect = hso_disconnect, 3228 .id_table = hso_ids, 3229 .suspend = hso_suspend, 3230 .resume = hso_resume, 3231 .reset_resume = hso_resume, 3232 .supports_autosuspend = 1, 3233 .disable_hub_initiated_lpm = 1, 3234}; 3235 3236static int __init hso_init(void) 3237{ 3238 int i; 3239 int result; 3240 3241 /* put it in the log */ 3242 printk(KERN_INFO "hso: %s\n", version); 3243 3244 /* Initialise the serial table semaphore and table */ 3245 spin_lock_init(&serial_table_lock); 3246 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3247 serial_table[i] = NULL; 3248 3249 /* allocate our driver using the proper amount of supported minors */ 3250 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3251 if (!tty_drv) 3252 return -ENOMEM; 3253 3254 /* fill in all needed values */ 3255 tty_drv->driver_name = driver_name; 3256 tty_drv->name = tty_filename; 3257 3258 /* if major number is provided as parameter, use that one */ 3259 if (tty_major) 3260 tty_drv->major = tty_major; 3261 3262 tty_drv->minor_start = 0; 3263 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3264 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3265 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3266 tty_drv->init_termios = tty_std_termios; 3267 hso_init_termios(&tty_drv->init_termios); 3268 tty_set_operations(tty_drv, &hso_serial_ops); 3269 3270 /* register the tty driver */ 3271 result = tty_register_driver(tty_drv); 3272 if (result) { 3273 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3274 __func__, result); 3275 goto err_free_tty; 3276 } 3277 3278 /* register this module as an usb driver */ 3279 result = usb_register(&hso_driver); 3280 if (result) { 3281 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3282 result); 3283 goto err_unreg_tty; 3284 } 3285 3286 /* done */ 3287 return 0; 3288err_unreg_tty: 3289 tty_unregister_driver(tty_drv); 3290err_free_tty: 3291 put_tty_driver(tty_drv); 3292 return result; 3293} 3294 3295static void __exit hso_exit(void) 3296{ 3297 printk(KERN_INFO "hso: unloaded\n"); 3298 3299 tty_unregister_driver(tty_drv); 3300 put_tty_driver(tty_drv); 3301 /* deregister the usb driver */ 3302 usb_deregister(&hso_driver); 3303} 3304 3305/* Module definitions */ 3306module_init(hso_init); 3307module_exit(hso_exit); 3308 3309MODULE_AUTHOR(MOD_AUTHOR); 3310MODULE_DESCRIPTION(MOD_DESCRIPTION); 3311MODULE_LICENSE(MOD_LICENSE); 3312 3313/* change the debug level (eg: insmod hso.ko debug=0x04) */ 3314MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3315module_param(debug, int, S_IRUGO | S_IWUSR); 3316 3317/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3318MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3319module_param(tty_major, int, S_IRUGO | S_IWUSR); 3320 3321/* disable network interface (eg: insmod hso.ko disable_net=1) */ 3322MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3323module_param(disable_net, int, S_IRUGO | S_IWUSR); 3324